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        python 项目自动生成requirements.txt文件
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<p>原文链接：<a href="https://www.cnblogs.com/tangqiu/p/9914817.html" target="_blank" rel="noopener">https://www.cnblogs.com/tangqiu/p/9914817.html</a></p>
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<p>任何应用程序通常需要设置安装所需并依赖一组类库来满足工作要求。要求文件是指定和一次性安装包的依赖项具体一整套方法，python也不例外。</p>
<h2 id="生成"><a href="#生成" class="headerlink" title="生成"></a>生成</h2><p>Python项目依赖，生成 <code>requirements.txt</code> 有两种方法</p>
<ol>
<li><p>进入需要生成文件的目录，执行 <code>pip freeze &gt; requirements.txt</code> ，此方法会包含环境所有的依赖包。这种方式配合 <code>virtualenv</code> 才好使，否则把整个环境中的包都列出来了</p>
</li>
<li><p><code>pip install pipreqs</code><br> 进入需要生成文件的目录执行： <code>pipreqs ./</code>     (或者直接  <code>pipreqs  D:\test(实际路径）</code>）</p>
<p> 在此时可能会遇见<br> <code>UnicodeDecodeError: &#39;gbk&#39; codec can&#39;t decode byte 0x80 in position 776: illegal multibyte sequence</code></p>
<p> 这个错误.</p>
<p> 解决方法：指定编码格式      <code>pipreqs ./  --encoding=utf8</code></p>
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<h2 id="安装"><a href="#安装" class="headerlink" title="安装"></a>安装</h2><p>如果要安装 <code>requirements.txt</code> 中的类库内容，那么你可以执行:  <code>pip install -r requirements.txt</code><br>或者通过:  <code>pip install -i https://pypi.doubanio.com/simple/ -r requirements.txt</code> 指定资源库地址来执行</p>

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